tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
3 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
4
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License as published by the Free Software Foundation;
8 * either version 2, or (at your option) any later version.
9
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
12 * the implied warranty of MERCHANTABILITY or FITNESS FOR
13 * A PARTICULAR PURPOSE.See the GNU General Public License
14 * for more details.
15
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc.,
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#include <linux/via-core.h>
23#include <linux/via_i2c.h>
24#include "global.h"
25
26static const struct IODATA common_init_data[] = {
27/* Index, Mask, Value */
28 /* Set panel power sequence timing */
29 {0x10, 0xC0, 0x00},
30 /* T1: VDD on - Data on. Each increment is 1 ms. (50ms = 031h) */
31 {0x0B, 0xFF, 0x40},
32 /* T2: Data on - Backlight on. Each increment is 2 ms. (210ms = 068h) */
33 {0x0C, 0xFF, 0x31},
34 /* T3: Backlight off -Data off. Each increment is 2 ms. (210ms = 068h)*/
35 {0x0D, 0xFF, 0x31},
36 /* T4: Data off - VDD off. Each increment is 1 ms. (50ms = 031h) */
37 {0x0E, 0xFF, 0x68},
38 /* T5: VDD off - VDD on. Each increment is 100 ms. (500ms = 04h) */
39 {0x0F, 0xFF, 0x68},
40 /* LVDS output power up */
41 {0x09, 0xA0, 0xA0},
42 /* turn on back light */
43 {0x10, 0x33, 0x13}
44};
45
46/* Index, Mask, Value */
47static const struct IODATA dual_channel_enable_data = {0x08, 0xF0, 0xE0};
48static const struct IODATA single_channel_enable_data = {0x08, 0xF0, 0x00};
49static const struct IODATA dithering_enable_data = {0x0A, 0x70, 0x50};
50static const struct IODATA dithering_disable_data = {0x0A, 0x70, 0x00};
51static const struct IODATA vdd_on_data = {0x10, 0x20, 0x20};
52static const struct IODATA vdd_off_data = {0x10, 0x20, 0x00};
53
54u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
55 *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
56 u8 index)
57{
58 u8 data;
59
60 viafb_i2c_readbyte(plvds_chip_info->i2c_port,
61 plvds_chip_info->lvds_chip_slave_addr, index, &data);
62 return data;
63}
64
65void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
66 *plvds_setting_info, struct lvds_chip_information
67 *plvds_chip_info, struct IODATA io_data)
68{
69 int index, data;
70
71 index = io_data.Index;
72 data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
73 index);
74 data = (data & (~io_data.Mask)) | io_data.Data;
75
76 viafb_i2c_writebyte(plvds_chip_info->i2c_port,
77 plvds_chip_info->lvds_chip_slave_addr, index, data);
78}
79
80void viafb_init_lvds_vt1636(struct lvds_setting_information
81 *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
82{
83 int reg_num, i;
84
85 /* Common settings: */
86 reg_num = ARRAY_SIZE(common_init_data);
87 for (i = 0; i < reg_num; i++)
88 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
89 plvds_chip_info, common_init_data[i]);
90
91 /* Input Data Mode Select */
92 if (plvds_setting_info->device_lcd_dualedge)
93 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
94 plvds_chip_info, dual_channel_enable_data);
95 else
96 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
97 plvds_chip_info, single_channel_enable_data);
98
99 if (plvds_setting_info->LCDDithering)
100 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
101 plvds_chip_info, dithering_enable_data);
102 else
103 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
104 plvds_chip_info, dithering_disable_data);
105}
106
107void viafb_enable_lvds_vt1636(struct lvds_setting_information
108 *plvds_setting_info,
109 struct lvds_chip_information *plvds_chip_info)
110{
111 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
112 vdd_on_data);
113}
114
115void viafb_disable_lvds_vt1636(struct lvds_setting_information
116 *plvds_setting_info,
117 struct lvds_chip_information *plvds_chip_info)
118{
119 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
120 vdd_off_data);
121}
122
123bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
124{
125 u8 Buffer[2];
126
127 DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
128
129 /* Sense VT1636 LVDS Transmiter */
130 viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
131 VT1636_LVDS_I2C_ADDR;
132
133 /* Check vendor ID first: */
134 if (viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR,
135 0x00, &Buffer[0]))
136 return false;
137 viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x01, &Buffer[1]);
138
139 if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
140 return false;
141
142 /* Check Chip ID: */
143 viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x02, &Buffer[0]);
144 viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x03, &Buffer[1]);
145 if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
146 viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
147 VT1636_LVDS;
148 return true;
149 }
150
151 return false;
152}
153
154static int get_clk_range_index(u32 Clk)
155{
156 if (Clk < DPA_CLK_30M)
157 return DPA_CLK_RANGE_30M;
158 else if (Clk < DPA_CLK_50M)
159 return DPA_CLK_RANGE_30_50M;
160 else if (Clk < DPA_CLK_70M)
161 return DPA_CLK_RANGE_50_70M;
162 else if (Clk < DPA_CLK_100M)
163 return DPA_CLK_RANGE_70_100M;
164 else if (Clk < DPA_CLK_150M)
165 return DPA_CLK_RANGE_100_150M;
166 else
167 return DPA_CLK_RANGE_150M;
168}
169
170static int get_lvds_dpa_setting_index(int panel_size_id,
171 struct VT1636_DPA_SETTING *p_vt1636_dpasetting_tbl,
172 int tbl_size)
173{
174 int i;
175
176 for (i = 0; i < tbl_size; i++) {
177 if (panel_size_id == p_vt1636_dpasetting_tbl->PanelSizeID)
178 return i;
179
180 p_vt1636_dpasetting_tbl++;
181 }
182
183 return 0;
184}
185
186static void set_dpa_vt1636(struct lvds_setting_information
187 *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
188 struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
189{
190 struct IODATA io_data;
191
192 io_data.Index = 0x09;
193 io_data.Mask = 0x1F;
194 io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
195 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
196 plvds_chip_info, io_data);
197
198 io_data.Index = 0x08;
199 io_data.Mask = 0x0F;
200 io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
201 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
202 io_data);
203}
204
205void viafb_vt1636_patch_skew_on_vt3324(
206 struct lvds_setting_information *plvds_setting_info,
207 struct lvds_chip_information *plvds_chip_info)
208{
209 int index, size;
210
211 DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
212
213 /* Graphics DPA settings: */
214 index = get_clk_range_index(plvds_setting_info->vclk);
215 viafb_set_dpa_gfx(plvds_chip_info->output_interface,
216 &GFX_DPA_SETTING_TBL_VT3324[index]);
217
218 /* LVDS Transmitter DPA settings: */
219 size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3324);
220 index =
221 get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
222 VT1636_DPA_SETTING_TBL_VT3324, size);
223 set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
224 &VT1636_DPA_SETTING_TBL_VT3324[index]);
225}
226
227void viafb_vt1636_patch_skew_on_vt3327(
228 struct lvds_setting_information *plvds_setting_info,
229 struct lvds_chip_information *plvds_chip_info)
230{
231 int index, size;
232
233 DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
234
235 /* Graphics DPA settings: */
236 index = get_clk_range_index(plvds_setting_info->vclk);
237 viafb_set_dpa_gfx(plvds_chip_info->output_interface,
238 &GFX_DPA_SETTING_TBL_VT3327[index]);
239
240 /* LVDS Transmitter DPA settings: */
241 size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3327);
242 index =
243 get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
244 VT1636_DPA_SETTING_TBL_VT3327, size);
245 set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
246 &VT1636_DPA_SETTING_TBL_VT3327[index]);
247}
248
249void viafb_vt1636_patch_skew_on_vt3364(
250 struct lvds_setting_information *plvds_setting_info,
251 struct lvds_chip_information *plvds_chip_info)
252{
253 int index;
254
255 DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
256
257 /* Graphics DPA settings: */
258 index = get_clk_range_index(plvds_setting_info->vclk);
259 viafb_set_dpa_gfx(plvds_chip_info->output_interface,
260 &GFX_DPA_SETTING_TBL_VT3364[index]);
261}